According to the theory of swing movable teeth meshing,a calculation method of friction coefficient between swing movable teeth and the internal gear under elastohydrodynamic lubrication was studied by using the theories of Hertz contact and tribology. And the time-varying discipline of friction coefficient in the drive process was analyzed. Meanwhile,According to the theory of Blok flash temperature theory,the calculation model of flash temperature in a meshing period under elastohydrodynamic lubrication was built based on the calculation of the contact half-width.The distribution of flash temperature along the meshing line in the drive process was analyzed through the MATLAB programming. Sensitivity analysis of the flash temperature to relevant variables was conducted to investigate the effects of the variations of input power,speed,swing movable tooth radius and teeth number on flash temperature.The example analysis results indicated that near the inflection point of internal gear profile curve,the flash temperature is the maximum.The research result is very significant for studying the scuffing strength of tooth surface and thermal stress.
